Separable fastener



F. S. CARR. SEPARABLE FASTENE R." APPLICATION FILED MAR. at 1921.

Patented 00. 31,1922.

Patented q. 1, dis.

ti FEED S. CARE, ()1? NEWTON, MASSACHUSETTS, ASSIGNOR TO GARE FASTENER COMPANY, OF CAYMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

SEI'PABABLE FAST ENER.

Application filed March 8,

1 '0 a U in]: 0-271 it ii/ay concern;

Be it known that l, FRED S. CAI-IR, a citizen of the United States, and a resident of Newton, in the county of Middlesex, Connnonwealth of lviassachusetts, have invented an Improvement in Separable Fasteners, of which the Following description, in connec tion with the accompanying drawiirgs, specification, like characters on the drawings representing like parts.

This invention pertains to improvements .in separable fasteners. it is among the objects of the invention to provide a superior snap fastener of simple and inexpensive construction.

In the drawings, which show a preferred term ct one embodiment of my invention hi. 0 1 is a front view of a preferred il orin ott fastener, the stud and socket being secured to flexible carrying means which are shown partially broken away;

llig. 2 is a section on the line 2-2 of Fig. 1, being partly in elevation; and j Fig. is an enlargedsection through the socket and stud of the fastener on the line 3% ct 2. j

Referring to the drawings and to the preterred form of fastener selected for illustralive purposes, l have shown a stud having a head, l: and a shank or neck 5, which may be secured to the stud-carrying fabric 6 in any suitable way, but preferably, as shown, by a metallic securing element 7, into which the base 8 01"" the stud may be expanded, as shown in my co-pending application Serial No. 331,780, filed January 16, 1920, to press the material into the securing element 7 beneath the flange 9 thereof. The socket may include a casing 10 secured to the socket-carrying ,tabric jljl in any suitable u .y, but preterabl y, as illustrated. by expanding projections 12 troin the socket casing 10 behind a rim 13 ot a socketsecuring cap tel, the tabric ll, being:- prcsuxd into and held in the socketsecuilag cap. preferably without perforation of the fabric. To minimize the chances Oil tearing or penetrating the fabric, the ends 15 of the ru'ojections l2 may be rolled over as showiji, thereby to present a blunt edge to the fabric. he socket securing cap 14 is preferably provided with an anvil. surface 16 which guides the socket-securing projections outwardly during the socket-securing; operation. In the preferred form of my invention selected for illustrative purposes, the socket 1O con-v erably etlected by notches 22 in the 1921. Serial No. 450,735.

tains, a spring 20 which is preferably, as shown, a flat metal disc having a stud-receiving aperture therethrough and split at one side, as shown at 21, to permit the disc to act as a spring, siu'iicient expansion being provided to permit the head of the stud to enter the socket.

The preferred torin of fastener illustrated is preferably atlapted to be locked against undesired separation of stud and socket by reason of the resolution oi forces arising from lateral strains. This locking is pretexterior periphery oil? the spring 20 at each side ot the split 21. Projections 23 enter the notches 22. these projections 23 being preferably a part of the socketcasing. The projections 23 are preferably so located as to enter the notches 252 somewhat at all times, thereby n'eventin any substantial turning move ment of tie spring 20 in the casing 10. The fastener should be applied to the carrying medium with the notches 22 in the line of strain so that the stud tends to move to the right, as viewed in Fig. 3, and the socket casing to the left, the spring 20 will move to the right relative to thecasing 10, thereby causing the projections 23 to engage in the notches 20 and prevent expansion oi the spring to release the head of the stud.

In the preferred term of my invention selected tor illustrative purposes. the projections A3 are thrown inwardly from the periphery of the socket casing and are wedge-shaped. the portions thereof most closely adjacent the split 21 being the por tions which hold the spring closed under lateral strain and the other portions thereof serving as struts to back up and strengthen the first mentioned portions thereof which receive the direct pressure troin the spring.

While I have shown and described a prelerred form of one embodiment of my in vention. it will be understood that major changes involving omission, substitution, alteration and reversal. of parts, and even changes in the mode of operation, be made without departing from the scope of my invention, which is best iilelined in the following claims.-

Claims.

1. A separable fastener comprising, in combination, a stud having a head and a neck, a socket including a casing, a spring loosely fitting said casing laterally, to P Hill Init shifting of said spring in said casing laterally, listed-receiving aperture in said spring, a split from said stud-receiving 11361- ture to the periphery of said spring, projections on said spring at each side of said split, and abutments from the casing for on gagenient at each side of saidprojections when strain is exerted tending to move said spring in said casing in direction toward the split in the springsaid projections and said abntinents opposing stud-releasing opening of said springrwhen in contact with each other.

2. A separable :tastener comprising in combination, a stud having a head and'a neck,

a socket incliuiling a casing, a spring looselv fitting said. casing: laterally, to permit shifting of said spring in said casing laterally, a studi'erieiying aperture in said spring, a split from said stud-receiving aperture to the periphery of said spring, projections on said spring at each side of said split, and abutments from the casing for engagement at each side oi said projections when strain is exerted tending to more sa-id spring in said casing in a direction toward the split in the spring, said projections and said abutment-s opposing stud-releasing opening of said spring when in contact with each other, said abutments cooperatingwith said projections to prevent substantial turning movement of said spring relative to said casing. V

3. A separable fastener comprising, in combination, a studhaving a head and a neck, and a socket including a casing having a spring therein. providing a stud-receiving aperture and a split from said aperture to the periphery of the spring, two

notches in the spring, one at each side of said split, and wedgeshaped projections from the periphery of the casing extending into said notches, said projections providing clearance to permit, expansion or" said spring When stud and socket are not under lateral strain urging said notches toward said projections, and said projections engaging the faces of said notches adjacent said split when strain is exerted bet-ween stud and socket to urge said spring toward said projections.

4, A separable ii'astener con'iprising, in combination, a stud having a head and a neck, and a socket including a casing having a spring therein providing a stridinceiving aperture and a split flOUlSitltl aperture to the periphery oi the spring. two notches in the spring, one at each side of said split, and Wedge-shaped projections from the periphery of the casing extending into said notches, said projections providing clearance to permit expansion. of said spring.

when stud and socket are not under lateral strain urging said notches toward said projections, and said projections engaging the faces of said notches adjacent said split when strain is exerted between stud andsocket to urge said spring toward said projections, the portions of said projections adjacent said split providing cain surfaces and the portions oi? said projections furthest removed from said split providing supporting struts tor strengt-hening'the first-named portions of said projections.

In testimony whereof, I have signed my name of this specificatio FRED S. CARR. 

